Rename ol.source.Image#getImage implementations to #getImageInternal

This allows for the reprojection to be initialized in the #getImage,
while #getImageInternal is used to obtain the actual data.

src/ol/source/imagecanvassource.js

@@ -59,7 +59,7 @@ goog.inherits(ol.source.ImageCanvas, ol.source.Image);
 /**
  * @inheritDoc
  */
-ol.source.ImageCanvas.prototype.getImage =
+ol.source.ImageCanvas.prototype.getImageInternal =
     function(extent, resolution, pixelRatio, projection) {
   resolution = this.findNearestResolution(resolution);
 

src/ol/source/imagemapguidesource.js

@@ -126,7 +126,7 @@ ol.source.ImageMapGuide.prototype.getParams = function() {
 /**
  * @inheritDoc
  */
-ol.source.ImageMapGuide.prototype.getImage =
+ol.source.ImageMapGuide.prototype.getImageInternal =
     function(extent, resolution, pixelRatio, projection) {
   resolution = this.findNearestResolution(resolution);
   pixelRatio = this.hidpi_ ? pixelRatio : 1;

src/ol/source/imagestaticsource.js

@@ -62,7 +62,7 @@ goog.inherits(ol.source.ImageStatic, ol.source.Image);
 /**
  * @inheritDoc
  */
-ol.source.ImageStatic.prototype.getImage =
+ol.source.ImageStatic.prototype.getImageInternal =
     function(extent, resolution, pixelRatio, projection) {
   if (ol.extent.intersects(extent, this.image_.getExtent())) {
     return this.image_;

src/ol/source/imagewmssource.js

@@ -185,7 +185,7 @@ ol.source.ImageWMS.prototype.getParams = function() {
 /**
  * @inheritDoc
  */
-ol.source.ImageWMS.prototype.getImage =
+ol.source.ImageWMS.prototype.getImageInternal =
     function(extent, resolution, pixelRatio, projection) {
 
   if (this.url_ === undefined) {